BS-181 HCl

Catalog No. size PriceQuantity
M6415-2 2mg solid $102
M6415-10 10mg solid $406



Product Information

BS-181 HCl is a highly selective CDK7 inhibitor with IC50 of 21 nM, and > 40-fold selective for CDK7 than CDK1, 2, 4, 5, 6, or 9.


Molecular Weight: 416.99


Formula: C₂₂H₃₃ClN₆


Smiles Code:




Room temperature in continental US; may vary elsewhere.



Powder    -20°C  3 years

4°C  2 years

In solvent -80°C  6 months

-20°C  1 month


In Vitro:

BS-181 promotes cell cycle arrest and inhibits cancer cell growth, and growth is inhibited for all cell lines tested, with IC50 values ranging from 11.5 to 37 μM. BS-181 inhibits RB phosphorylation at Ser795 and Ser821 with an apparent IC50 of 15 μM, similar to the IC50 obtained for P-Ser2 inhibition. BS-181 treatment of MCF-7 cells leads to G1 arrest at and apoptosis. BS-181 inhibits GC cell and normal gastric epithelial RGM-1 cell line growth with inhibitory concentration (IC50) ranging from 17 to 22 μM and 6.5 μM, respectively. BS-181 significantly inhibits cell migration and invasion ability in a dose-dependent manner.


In Vivo:

BS-181 (5 mg/kg, 10 mg/kg, i.p.) inhibits the growth of MCF-7 tumors in nude mice. Intravenous (i.v) and i.p administration of 10 mg/kg BS-181 shows rapid clearance[1]. BS-181 (10 mg/kg/d or 20 mg/kg/d, i.p.) significantly inhibits the growth of tumor in a dose-dependent manner compared to the control group.





  1. Ali S et al. The development of a selective cyclin-dependent kinase inhibitor that shows antitumor activity. Cancer Res. 2009 Aug 1;69(15):6208-15.


  1. Wang BY, et al. Selective CDK7 inhibition with BS-181 suppresses cell proliferation and induces cell cycle arrest and apoptosis in gastric cancer. Drug Des Devel Ther. 2016 Mar 16;10:1181-9.


Products are for research use only. Not for human use.

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